Flue-joint structure.



No. 852,278. PATENTED APR. so, 1907. A. LEGGETT.

PLUE JOINT STRUCTURE.

APPLICATION FILED MAY 23. 1906.

II, I 1 R qbk Wzizemrem jwvewzoz M7 e/lleuwwzer I??? 62%? ALEXANDERLEGGETT, QF MICHIGAN CITY, INDIANA.

FLUE-JOINT STRUCTURE.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed May 23,1906. Serial No 818,394-- Z'o (H who/1t itIIML-j/ con/corn:

Be it known that I, ALEXANDER l lnoon'r'r, a citizen of the UnitedStates, residing at Michigan City, in the county of liaporte and Stateof Indiana, have invented new and useful Improvements in Flue-JointStructures, of which the following is a specification.

This invention relates to means for securing tulle-s or lines in theflue sheets, particularly the furnace sheet; and theobject of the sameis to so construct the flue ends and to arrange means in cooperationtherewith that leakage will he obviated, and rusting at the jointsbetween the flue ends and. the sheet prevented without in the leastoistructing necessary expansion and contraction in the fines.

By the improved organization of elements and structural features, thellues will be rendered more durable and thus materially economize toilerstructures.

The invention consists in the construction. and arrangement of theseveral parts which will be more fully hereinafter set forth.

in the drawing: Figure 1 is a longitudinal section of portions of linesheets showing a :l'lue disposed therein and connected in accordancewith the features of the invention. Fig. 2 is a detail view of the frontextremity of the flue. Figs. 3 and. 4e are detail views respectively ofa sleeve and one of the rings embodied in the flue extremity joint.

Similar numerals of reference are employed to indicate correspomlingparts in the several views.

The numerals l and 2 designate the flue sheets which are of ordinaryconstruction with the exception that the openings for the flue in thefurnace sheet 1 are reamed out or countersunk as at 3, both in the frontand rear sides of the sheet. The improved llue joint is shown appliedparticularly in. conneotion with the l lue extremity engaging thefurnace sheet, but it will he understood that the same joint might beemployed in connection with the opposite extremity of the line if founddesirable. Furthermore, instead of applying the joint to ai'lue it mightbe equally well used with a water tube. The line +i has fitted in theextremity thereof, adjacent to the furnace sheet 1., a diznnetrimllyreduced extension 5 of similar material, the forward end of saidextension being flared outwardly 5 as at 6 to contact with the innersurface of j the fine 4; and the free end of the latter is bentinwardly'or inwardly flanged as at 7 to provide a seat in conjunctionwith the adj acent eountersunk edge of the opening 8 through thesheet 1. A soft copper ring 9 is placed over the reduced extension 5close to the inwardly bent or llanged end 7 of the line 4.; and theextension 5 when inserted through the opening 8 of the sheet 1 causesthe said ring 9 to be forced tack against the flanged extremity of theline 1-, and when the line is drawn into place said ring snugly its inthe seat provided by the end of the line and the countersunk edge of theopening 8. A cop per sleeve l() is litted over the extension 5 and is ofa width. correspmiding to the thickness of the sheet 1 and bears againstthe wall of the opening A second soft copper ring ll. is then appliedover the projecting end of the extension 5 in rear of the sheet 1 orwithin the fire box or furnace, and after the last named ring has beenapplied the extension 5 is expanded and the rear end thereof upset orflared so as to bring the ring 11 in close con tact with the rearcountersunk edge 3 of the opening 8.

The sleeve serves as a ferrule to incase that part of the extension orthe [hie structure which is projecl'ra'l through the opening 8 andcooperating with the soft copper rings 9 and. 11 produces a tight jointwhich will overcome any tendency to leakage and will render theconnected. extremity of the line exceptionally strong and durable.Furthermore, by the intrmluction of the copper sleeve or ferrule 10,rusting of the portion of the flue engaging the opening 8 will also beprevented and. said part of the l lue is practically reinforced orthickened and will not be burnt out so readily as in ordinary llueconstructions. By applying the soft copper rings 9 and 11 on oppositesides of the sheet and forcing them closely into the countersunk orreamed out edges 3 of the opening 8, all crevices or openings that mightotherwise exist are fully closed, the soft copper rings readilyconforming to the co ntour of the edges of the opening and thuseffectively operating to prevent leakage at the joint. The end. of thellue 4 against which the soft copper ring 9 has bearing serves as ashoulder to press the said ring into place. in .linally completing thejoint the usual expanding and rolling impleincnt is used and thepressure exerted thereby from the interior of the flue oint will effecta very snug fitting of the portion of the extension and the sleeve orferrule 10 with respect to the opening 8.

The improved flue joint will be found exceptionally advantageous, and inView of the economy which arises from the use thereof, owing to theincreased durability of the flue thereby provided, the expense insetting flues or applying flues to flue sheets will not be increased,particularly when it is considered from a comparative standpoint or withrespect to the annoyance of frequent repairs required in the commonmethods of attaching or securing flue ends in flue sheets.

This mode of securing flues is adapted to be used in general boilerfurnace constructions, but it is particularly advantageous in to becomeloose owing to the rack and tear thereon due to the vibration caused bythe running of such engines.

Having thus fully described the invention, what is claimed as new, is

1. The combination with a flue sheet having an opening therethrough, ofa reduced flue extremity fitted in said opening, metal rings on oppositesides of the flue sheet and held close to the edges of the said opening,and a metal sleeve surrounding the reduced extremity of the flue Within.the opening or the flue sheet, the rings being also closely held againstthe opposite side edges of the sleeve.

2. In a flue joint structure, the combination with a flue sheet havingan opening therethrough, the sheet having the opposite edges around theopening reamed out or countersunk, of a flue having a reduced extremityfitted in said opening, a metal sleeve surrounding the flue extremitywithin the opening, and metal rings on the flue extremity held close toopposite sides of the opening of the flue sheet and with n the reamedout or countersunk edges of the sheet around the opening.

3. In a flue joint structure, the combination with a flue sheet havingan opening therein, of a flue extremity fitted in said opening, a metalsleeve surrounding the said extremity and located Within the opening,and ring devices applied to the flue extremity and held closely againstopposite edges of the opening.

4. In a flue joint structure, the combination with a flue sheet havingan opening therein, of a reduced flue extremity inserted in saidopening, a metal sleeve surrounding the flue extremity Within theopening, and ring devices held in close contact with opposite edges ofthe flue sheet opening and the opposite edges of the sleeve by portionsof the flue.

5. In a flue joint structure, the combination with a flue sheet havingan opening therein, of a reduced flue extremity inserted in saidopening, a copper sleeve surrounding the flue extremity within theopening, and soft copper rings also surrounding the flue extremity andclosely held against the opposite edges of the sleeve.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

ALEXANDER LEGGETT.

lVitnesses FRANK J. CONBOY, JULIUS C. TRAVIS.

